I can't answer the submission question, but I can answer the other one. From the NGC page on coins they will grade, they list ancients (pre-AD 500), anything in the Krause catalogues (1601-present). In between, they only do European (roughly 1300-1600) and Byzantine. Early Islamic are not included.
You should also be aware that NGC only guarantees the grade of an ancient. They do not guarantee authenticity or identification/attribution.
You should also be aware that NGC only guarantees the grade of an ancient. They do not guarantee authenticity or identification/attribution.
Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis




















